function resize_max_topic_img(this1){
	this1.style.maxWidth='none';
	this1.style.maxHeight='none';
	this1.style.width='auto';
	this1.style.height='auto';
}
function resize_min_topic_img(this1){
	this1.style.maxWidth='150px';
	this1.style.maxHeight='75px';
	this1.style.width='auto';
	this1.style.height='auto';
}